Is there a plugin to edit text boxes in Google Chrome with Vim keyboard shortcuts? I mean without copy pasting the text into a separate window?
Try this addon, which is available for Chrome, Firefox, and Opera: http://appsweets.net/wasavi/
Take a look at TextEditorAnywhere: http://www.listary.com/text-editor-anywhere It not only works for the browser, for almost all other applications, too. It's freeware.